Unity3D Camera Shake Script

Unity3D Camera Shake Free Script

After much Googling for how to do a camera shaking effect in Unity, I decided to write my own small script to accomplish the effect. It combines both positional movement with rotational movement to simulate closely an actual camera shake.
The two key variables are:

shake_intensity

Shake_intensity determines the initial intensity of the shaking — how much variance to allow in the camera position.

shake_decay

Shake_decay controls is the amount that shake_intensity is decremented each update. It determines if the shake is long or short.

JavaScript

var originPosition:Vector3;
var originRotation:Quaternion;
var shake_decay: float;
var shake_intensity: float;;
 
function OnGUI () {
   if (GUI.Button (Rect (20,40,80,20), "Shake")) {
      Shake();
   }
}
 
function Update(){
   if(shake_intensity > 0){
      transform.position = originPosition + Random.insideUnitSphere * shake_intensity;
      transform.rotation = Quaternion(
      originRotation.x + Random.Range(-shake_intensity,shake_intensity)*.2,
      originRotation.y + Random.Range(-shake_intensity,shake_intensity)*.2,
      originRotation.z + Random.Range(-shake_intensity,shake_intensity)*.2,
      originRotation.w + Random.Range(-shake_intensity,shake_intensity)*.2);
      shake_intensity -= shake_decay;
   }
}
 
function Shake(){
   originPosition = transform.position;
   originRotation = transform.rotation;
   shake_intensity = .3;
   shake_decay = 0.002;
}

C#

using UnityEngine;
using System.Collections;
public class cameraShake : MonoBehaviour
{
   private Vector3 originPosition;
   private Quaternion originRotation;
   public float shake_decay;
   public float shake_intensity;
 
   void OnGUI (){
      if (GUI.Button (new Rect (20,40,80,20), "Shake")){
         Shake ();
      }
   }
 
   void Update (){
      if (shake_intensity > 0){
         transform.position = originPosition + Random.insideUnitSphere * shake_intenity;
         transform.rotation = new Quaternion(
         originRotation.x + Random.Range (-shake_intensity,shake_intensity) * .2f,
         originRotation.y + Random.Range (-shake_intensity,shake_intensity) * .2f,
         originRotation.z + Random.Range (-shake_intensity,shake_intensity) * .2f,
         originRotation.w + Random.Range (-shake_intensity,shake_intensity) * .2f);
         shake_intensity -= shake_decay;
      }
   }
 
   void Shake(){
      originPosition = transform.position;
      originRotation = transform.rotation;
      shake_intensity = .3f;
   shake_decay = 0.002f;
   }
}

Unity3D Camera Shake Free Script